Maximum contaminant level Study guides, Class notes & Summaries
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AWWA WSO Water Treatment Grades 3&4 Questions With Complete Solutions.
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Which disinfectant would work best against cryptosporidium? - Ozone 
The pH of a water sample is greater that the pHs so the Langlier index? - Indicates the water is 
scale forming. 
When water high in calcium bicarbonate is softened by ion exchange - Sodium bicarbonate 
remains in the product water. 
Lime softening can effectively disinfect water because: - The pH level is higher than 10.5 
A noncarbonate hardness compound is - MgSO4 
What term refers to the reintroduction of carbon dioxide int...
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Water Distribution Exam 2023-2024 Questions and Answers 100% Accurate
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Water Distribution Exam 2023-2024 Questions and Answers 100% AccurateWater Distribution Exam 2023-2024 Questions and Answers 100% AccurateWater Distribution Exam 2023-2024 Questions and Answers 100% Accurate 
 
Potable water may be defined as: 
 
a. Any water that occasionally may be polluted from another source 
b. Any water that, according to recognized standards, is safe for consumption 
c. Water high in organic content 
d. Water that has been transported from outside the service area - ANSWE...
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Water Distribution(203/2024 Latest Update)correct 100%
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Water Distribution(203/2024 Latest Update)correct 100% 
 
Potable water may be defined as: 
 
a. Any water that occasionally may be polluted from another source 
b. Any water that, according to recognized standards, is safe for consumption 
c. Water high in organic content 
d. Water that has been transported from outside the service area - ANSWER b). Any water that according to recognized standard is safe for human consumption. 
 
To prevent the entry of surface contamination into a well is the ...
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Water Distribution Exam Sample Text Questions & Answers(SCORED A+)
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What is the federal law that protects public water supplies from harmful contaminants? - ANSWER SDWA Safe Drinking Water Act 
 
MCL stands for - ANSWER Maximum Contaminant Level 
 
True or False? 
 
Primary regulations are mandatory - ANSWER TRUE 
 
Secondary regulations are about what 3 things? - ANSWER Taste 
Odor 
Color of water 
 
True or False? 
 
Secondary regulations are mandatory - ANSWER FALSE 
 
What is the minimum pressure that must be maintained at all times in a distribution system?...
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Water Distribution 1 certification state exam questions and answers Graded-A
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Water Distribution 1 certification state 
exam questions and answers Graded-A 
Potable water may be defined as: 
a. Any water that occasionally may be polluted from another source 
b. Any water that, according to recognized standards, is safe for consumption 
c. Water high in organic content 
d. Water that has been transported from outside the service area - CORRECT 
ANSWER-b). Any water that according to recognized standard is safe for human 
consumption. 
To prevent the entry of surface con...
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Grade 1 Water Distribution Multiple Choice Questions and Answers Updated
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Grade 1 Water Distribution Multiple Choice Questions and Answers Updated 
 
Which agency sets legal limits on the concentration levels of harmful contaminants in potable water distributed to customers? 
a. National Primary Drinking Water Regulations Agency 
b. US EPA 
c. US Public Health Service 
d. Occupational Health and Safety Administration - B 
 
The number of monthly distribution system bacteriological samples required is 
a. based on the water withdrawal permit limit 
b. based on the syst...
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AWWA ABC Water Distribution Grades 1 & 2 questions and answers
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Which agency sets legal limits on the concentration levels of harmful contaminants in potable water 
distributed to customers? - US Environmental Protection Agency 
The number of monthly distributions system bacteriologiacal samples required is - Based on the 
population served 
What is the maximum contaminant level for total trihalomethanes (TTHM) in the united States? - 
0.080 mg/L 
Under the Surface Water Treatment Rule, disinfection residuals must be collected at the same 
location in the di...
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TCEQ Class D Water Operator License Exam Questions and Answers Latest 2024/2025 | 100% Correct | Graded A+
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TCEQ Class D Water Operator License Exam Questions and Answers Latest 2024/2025 | 100% Correct | Graded A+. Drought is an extended period when a region receives a deficiency in its 
________ water supply. 
(Ans- atmospheric, ground, or surface 
T/F: Only about 1 gallon of tap water per person/day is used for drinking 
and cooking 
(Ans- True 
Excluding outside water use, the average household uses about _______ 
gallons of water per month for inside use 
(Ans- 2,000 
T/F: Only 3% of all the fres...
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Water Operator Certification Study Material (New Mexico) 100 Questions with 100% Correct Answers | Verified | Latest Update 2024
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What is MCL? - Maximum Contaminent Level (MCL) 
A public water system is any system that serves a population greater that or equal to ? - 15 services 
connections or 25 people regulary 
What is the Maximum total chlorine residual allowed by the Disinfectant-Disinfection By-Prouducts Rule 
- 4 mg/l 
What type of contaminant is Iron? - Secondary 
Which Primary Contaminant is sometimes added to water supplies to prevent tooth decay? - 
Fluoride 
The Failure of a public water system to comply with t...
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Water Distribution 1 certification state exam questions and answers Graded-A
- Exam (elaborations) • 36 pages • 2024
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Water Distribution 1 certification state 
exam questions and answers Graded-A 
Potable water may be defined as: 
a. Any water that occasionally may be polluted from another source 
b. Any water that, according to recognized standards, is safe for consumption 
c. Water high in organic content 
d. Water that has been transported from outside the service area - CORRECT 
ANSWER-b). Any water that according to recognized standard is safe for human 
consumption. 
To prevent the entry of surface con...
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